diff --git a/Layout/default/Invoice/Print.pdf.php b/Layout/default/Invoice/Print.pdf.php
index 7eecd7ddc..44939f411 100644
--- a/Layout/default/Invoice/Print.pdf.php
+++ b/Layout/default/Invoice/Print.pdf.php
@@ -93,7 +93,9 @@ $is_credit = $net_total < 0;
                     <tr class="<?=($i%2 == 0) ? "even" : "odd" ?> one-position">
                         <td class="name">
                             <span class="product-name"><?=$p->product_name?></span>
-                            <?php if($start_date->format("d.m.Y") != $end_date->format("d.m.Y")): ?>
+                            <?php if($p->billing_period > 1): ?>
+                                &nbsp;(<?=$start_date->format("m/Y")?> - <?=$end_date->format("m/Y")?>)
+                            <?php elseif($start_date->format("d.m.Y") != $end_date->format("d.m.Y")): ?>
                                 &nbsp;(<?=$start_date->format("d.m.Y")?> - <?=$end_date->format("d.m.Y")?>)
                             <?php endif; ?>
                             <?=($p->matchcode) ? "<div class='pl-2'>".$p->matchcode."</div>" : ""?>
diff --git a/application/Admin/functions/IvtContractImport.php b/application/Admin/functions/IvtContractImport.php
index 0b7750b21..d69d7c013 100644
--- a/application/Admin/functions/IvtContractImport.php
+++ b/application/Admin/functions/IvtContractImport.php
@@ -212,6 +212,7 @@ class Admin_IvtContractImport {
 
             $finish_date->modify("first day of this month");
             $finish_date->setTime(2,0,0);
+            $finish_date->modify("+1 month"); // XXX for debugging only; must be removed
             //$finish_date->setDate($finish_date->format("Y"), $finish_date->format("m"), 1);
             //$finish_date->modify("+1 hours");
 
diff --git a/application/Admin/functions/IvtCreditImport.php b/application/Admin/functions/IvtCreditImport.php
index cc90709cc..45948c217 100644
--- a/application/Admin/functions/IvtCreditImport.php
+++ b/application/Admin/functions/IvtCreditImport.php
@@ -165,6 +165,7 @@ class Admin_IvtCreditImport {
                 $finish_date = new DateTime($cust_cred->lastdate);
                 $finish_date->modify("first day of this month");
                 $finish_date->setTime(2,0,0);
+                $finish_date->modify("+ 1 month"); // XXX for debugging only; must be removed
                 //$finish_date->setDate($finish_date->format("Y"), $finish_date->format("m"), 1);
 
                 $data["orderproduct_id"] = null;
diff --git a/application/Billing/BillingController.php b/application/Billing/BillingController.php
index 15db0aec9..1f81e7f37 100644
--- a/application/Billing/BillingController.php
+++ b/application/Billing/BillingController.php
@@ -107,8 +107,9 @@ class BillingController extends mfBaseController {
         $now_year = date("Y");
         $now_month = date("m");
         $now_day = date("d");
-        $now_year = 2024;
-        $now_month = 7;
+        //$now_year = 2024;
+        //$now_month = 6;
+        $now_day = 3; // XXX for debugging only, must be removed
 
         // XXX only for 1st Billing after IVT Import
         //$yearly_not_before = new DateTime("$now_year-$now_month-01");
@@ -123,7 +124,7 @@ class BillingController extends mfBaseController {
 
         $this->log->notice(__METHOD__.": $del Billing records deleted");
         //$stop = false;
-        foreach(ContractModel::search(["finish_date<" => mktime(0,0,0,$now_month, $now_day, $now_year), "cancel_date" => null]) as $contract) {
+        foreach(ContractModel::search(["finish_date<" => mktime(0,1,0,$now_month, $now_day, $now_year), "cancel_date" => null]) as $contract) {
         //while(!$stop) {
             //$stop = true;
             //$contract = new Contract(1475);
@@ -238,8 +239,10 @@ class BillingController extends mfBaseController {
                     }
 
                     if($create_date->format("Y") == $finish_year && $create_date->format("m") == $finish_month) {
-                        // this is the finish month, so set day back to day of finish_date
-                        $create_date->setDate($finish_year, $finish_month, $finish_day);
+                        // this is the finish month, so set day back to day of finish_date, unless billing_period is more than 1 month
+                        if($contract->billing_period == 1) {
+                            $create_date->setDate($finish_year, $finish_month, $finish_day);
+                        }
                         $last_create_date = true;
                     }
 
diff --git a/application/Billing/BillingModel.php b/application/Billing/BillingModel.php
index b0bbc08af..23a72bb44 100644
--- a/application/Billing/BillingModel.php
+++ b/application/Billing/BillingModel.php
@@ -31,6 +31,7 @@ class BillingModel {
     public $price;
     public $price_setup;
     public $vatrate;
+    public $billing_period;
 
     public $create_by;
     public $edit_by;